Chimney cowl or ventilator.



. No. 860,721. v PATENTBD JULY 23, 1907.

A. c. BADGER.

CHIMNEY cow 0R VENTILATOR.

APPLIO ATION FILED NOY.2 3|1906.

Inventor UNITED STATES I ARTHUR G. BADGER, OF NEWTON, MASSACHUSETTS.

CHIMNEY COWL OR VENTILATOR.

Specification of Letters Patent.

Patented July 23, 1907.

Application filed November 23, 1906. Serial No. 344,712.

To all 'whom it may concern:

Be it known that I, ARTHUR O. BADGER, of Newton, in the county ofMiddlesex and State of Massachusetts, have invented certain new anduseful Improvements in Chimney (lowls or Ventilators, of which thefollowing is a specification.

This invention relates to chimney cowls or ventilators which arepivotally mounted and adapted to be moved by wind pressure so that agiven portion of the cowl will always face the wind.

The invention has for its object to provide an improved constructionwhereby the efliciency of a cowl of this class will be increased, and astrong outward draft created by external wind currents passing over thecowl and deflected by parts of the same.

The invention consists in the improvements which I will now proceed todescribe and claim.

Of the accompanying drawings, forming a part of thisspeciiication,-Figure 1 represents a side elevation of a chimney cowlembodying my invention. Fig. 2 represents an end elevation of the samelooking toward the rear or leeward end. Fig. 3 represents a longitudinalvertical section on a larger scale. Fig. 4 represents a section on line44 of Fig. 3. Fig. 5 represents a side elevation showing a modification.

The same letters of reference indicate the same parts in all thefigures.

Referring first to Figs. 1, 2, 3, and 4, 12 represents a hood or casingwhich constitutes a substantially hori 3O zontal conduit open at bothends to provide two outlets for the air and products of combustionissuing from a stack or chimney, the casing having at its lower side adownwardly-projecting intermediate inlet branch 13 which communicateswith the stack or chimney, and

conducts the air and gases therefrom into the hood 12, from both ends ofwhich the air and gases are adapted to escape, as indicated by arrows inFig. 3. The hood 12 is pivotally mounted so that it is adapted to turnon a vertical axis between the open ends. The means here shown forpivotally mounting the hood, comprise a sleeve 14 adapted to be afiixedto the upper portion of a stack or chimney, and projecting into theinlet branch 13, a standard 15 supported by a cross bar 16 aflixed tothe lower portion of the sleeve 14, and passing through a guide 17allixed to the upper portion of said sleeve, a downwardly-projectingstud 18 affixed to the upper central portion of the hood l2, and a ball19 interposed between the upper end of the stud 15 and the lower end ofthe. stud 1S, and constituting an anti-frictional step which permits thefree rotation of the stud l8 and the hood to which it is attached. Thestuds 15 and 18 and the ball 19 are kept in their proper relativepositions by a socket 20 secured by a pin 21 to the stud 15, andprojecting upwardly above said stud, so that it contains the ball 19 andthe lower portion of the stud 18.

The hood is provided with a yoke 22 having an opening which surroundsthe socket 20 below the pin 21, said yoke preventing the hood fromoscillating and being displaced vertically. 23 represents awind-spreading deflector, which is preferably of conical form, and isaffixed to the hood 12 by arms 24 or other suitable means. Thelongitudinal center of the deflector 23 is preferably coincident withthat of the hood 12, and its base or open end overlaps the adjacent endof the hood, and is separated therefrom by an outlet space 25, whichpreferably surrounds the adjacent endof the casing. The deflector 23 isclosed at its outer end.

26 represents a vane or wing affixed to the hood 12, and arranged to beacted on by the wind in such manner as to cause the spreading deflector23 to face the Wind, the vane 26 being located at the opposite side ofthe vertical axis of the hood from the spreading deflector 23. 27represents a Wind-condensing deflector, which is preferably offrusto-conical form, and is rigidly connected with the hood 12, the saiddeflector surrounding the leeward end of the hood, and being separatedtherefrom by a passage 28 which surrounds the leeward end of the hood.The larger end of the condensing deflector is of considerably greaterdiameter than the hood, and faces the wind so that it catches the windwhich flows along the exterior of the casing, and deflects the sameinwardly into close proximity to the outlet of the casing at the leewardend.

It will be seen from the foregoing that wind approaching the cowl isconstantly deflected outwardly by the spreading deflector 23, and isthus caused to flow across the mouth of the outlet space 25, and inducea flow of air and gases from the interior of the casing through saidoutlet space, as indicated by arrows in Fig. 3.

It will also be seen that the wind caught by the larger end of thecondensing deflector 27 is deflected inwardly by the latter, and causedto flow in an annular stream around the opening at the leeward end ofthe hood, thus facilitating the outward flow of air and gases throughthe leeward end of the hood. The condensing deflector 27 is preferablymore abruptly inclined than the portion of the hood which it surrounds,so that the space between the condensing deflector and the hood iscontracted from the receiving to the delivering end. This contractiontends to increase the velocity of the air discharged at the deliveringend of the condensing deflector, and cor respondingly increases thedraft or suction through the leeward opening or outlet of the hood.

By providing a rotatable hood with two outlets, one at the windward andone at the leeward end, and with a wind-spreading deflector at thewindward end and a wind-condensing deflector at the leeward end, Igreatly increase the effectiveness of the cowl or ventilator, as will bereadily seen.

of the deflector 23 above described. In this embodiment, the air andgases flow from both ends of the hood, but the current flowing from theleeward end is not affected by the inward deflection of external airflowing over said end.

My invention is not limited to the details of construction here shown,and these may be variously modified.

I claim:

1. A chimney cowl comprising a hood or flue forming a substantiallyhorizontal passage open at both ends, said hood having adownwardly-extending inlet branch intermediate its open ends, adeflector closed at one end and affixed to the hood, its open endoverlapping one of the open ends of the hood, and being separatedtherefrom by an outlet space, means for pivotally supporting the hoodand deflector, and means for adjusting the cowl by wind pressure to keepthe closed end of the deflector toward the wind.

2. A chimney cowl comprising a substantially horizontal hood or flueopen at both ends and having a downwardlyextending inlet branch betweenits open ends, means for pivotally supporting the hood, and permittingit to turn on a vertical axis between the open ends of the hood, :1deflector closed at one end and aflixed to the hood at one side of itsaxis, the open end of the deflector overlapping one of the open ends ofthe hood to form an outlet space, and a vane affixed to the hood at theopposite side of its axis.

3. A chimney cowl comprising a substantially horizontal hood or flueopen at both ends and having an intermediate inlet branch, awind-spreading deflector closed at one end, its open end surrounding oneof the end openings of the hood, a wind-condensing deflector open atboth ends, and surrounding the opposite open end of the hood, eachdeflector being separated from the corresponding end portion of the hoodby an air passage, means for pivotally supporting the hood and itsattachments, and means for adjusting the hood by wind pressure to keepthe closed end of the spreading deflector toward the wind.

4. A chimney cowl comprising a substantially horizontal hood or flueopen at both ends, and having an enlarged central portion, contractedend portions, and an intermediate inlet branch, means for pivotallysupporting the hood, means for keeping one of its open ends toward thewind, a conical wind-spreading deflector aflixed to the hood at thewindward end, and a frusto-conical wind-condensing deflector aflixed tothe hood at the leeward end.

In testimony whereof I have aflixed my signature, in presence of twowitnesses.

ARTHUR C. BADGER.

Witnesses:

C. F. BROWN, E. Bn'rcnnnnnn.

